The Effects of Recovery Method and Refractive Status on the Recovery Process of Visual Fatigue

2020 ◽  
pp. 380-385
Author(s):  
Xinran Xu ◽  
Xiangchuan Wang ◽  
Ruifeng Yu
Keyword(s):  
Recovery Process ◽  
Visual Fatigue ◽  
Recovery Method ◽  
Refractive Status

scholarly journals Parameter Research of UAV Vertical Rope-type Recovery System

2018 ◽  
Vol 179 ◽  
pp. 03001
Author(s):  
Chengjing Ma ◽  
Xing'an Liu ◽  
Caiwen Zhang
Keyword(s):  
Simulation Analysis ◽  
Initial Conditions ◽  
Recovery Process ◽  
Resistance Force ◽  
Recovery Method ◽  
Recovery System ◽  
Recovery Performance ◽  
Stiffness And Damping Coefficient ◽  
Stiffness And Damping ◽  
Type Recovery

Vertical rope-type recovery system is a new accurate recovery method for small fixed-wing unmanned aerial vehicles (UAV). This paper models the recovery system and finishes the simulation of recovery process. The recovery stand model of the recovery system is built by analyzing the physical essence, and the aircraft model is based on dynamics and kinematics equations as well as the mechanical characteristics of arresting rope. Finally the simulation analysis of the recovery process is completed. On the basis of the modeling simulation, the system parameters’ effect on recovery performance such as maximum resistance force, maximum overload and maximum radius has been discussed by varying each key parameter. Eventually, the pattern of how initial conditions when hitting the rope as well as the arresting rope’s stiffness and damping coefficient influence recovery performance has been researched, and the result could provide theoretical reference for the design of UAV using vertical rope-type recovery and the system in the future.

scholarly journals Neuro-Simulation Tool for Enhanced Oil Recovery Screening and Reservoir Performance Prediction

2017 ◽  
Vol 1 (2) ◽  
pp. 54 ◽  
Author(s):  
Soheil Bahrekazemi ◽  
Mahnaz Hekmatzadeh
Keyword(s):  
User Interface ◽  
Enhanced Oil Recovery ◽  
Graphical User Interface ◽  
Oil Recovery ◽  
Recovery Process ◽  
Production Costs ◽  
Screening Tools ◽  
Simulation Tool ◽  
Screening Criteria ◽  
Recovery Method

Assessment of the suitable enhanced oil recovery method in an oilfield is one of the decisions which are made prior to the natural drive production mechanism. In some cases, having in-depth knowledge about reservoir’s rock, fluid properties, and equipment is needed as well as economic evaluation. Both putting such data into simulation and its related consequent processes are generally very time consuming and costly.  In order to reduce study cases, an appropriate tool is required for primary screening prior to any operations being performed, to which leads reduction of time in design of ether pilot section or production under field condition. In this research, two different and useful screening tools are presented through a graphical user interface. The output of just over 900 simulations and verified screening criteria tables were employed to design the mentioned tools. Moreover, by means of gathered data and development of artificial neural networks, two dissimilar screening tools for proper assessment of suitable enhanced oil recovery method were finally introduced. The first tool is about the screening of enhanced oil recovery process based on published tables/charts and the second one which is Neuro-Simulation tool, concerns economical evaluation of miscible and immiscible injection of carbon dioxide, nitrogen and natural gas into the reservoir. Both of designed tools are provided in the form of a graphical user interface by which the user, can perceive suitable method through plot of oil recovery graph during 20 years of production, costs of gas injection per produced barrel, cumulative oil production, and finally, design the most efficient scenario.

Sleep – A Game Changer in the Athletic World?

2018 ◽  
Vol 66 (4) ◽  
Keyword(s):  
Performance Optimization ◽  
High Performance ◽  
Recovery Process ◽  
Poor Sleep ◽  
Recovery Method ◽  
Lack Of Sleep ◽  
And Performance ◽  
The Individual ◽  
Traditional Approaches ◽  
And Control

The restorative qualities of sleep are fundamentally the basis of the individual athlete’s ability to recover and perform, and to optimally be able to challenge and control the effects of exercise regimes in high performance sport. Research consistently shows that a large percentage of the population fails to obtain the recommended 7–9 hours of sleep per night [17]. Moreover, recent years’ research has found that athletes have a high prevalence of poor sleep quality [6]. Given its implications on the recovery process, sleep affects the quality of the athlete’s training and outcome of competitions. Although an increasing number of recovery aids (such as cold baths, anti-inflammatory agents, high protein intake etc.) are available, recent years research show the important and irreplaceable role of sleep and that no recovery method can compensate for the lack of sleep. Every facet of an athlete’s life has the capacity to either create or take out energy, contribute to the overall stress level and subsequently the level of both recovery and performance. While traditional approaches to performance optimization focus simply on the physical stressors, this overview will highlight the benefits and the basic principles of sleep, its relation to recovery and performance, and provide input and reflect on what to consider when working with development and maintenance of athletic performance.

Recovery of 1-Butyl-3-Methylimidazolium-Based Ionic Liquids

2014 ◽  
Vol 879 ◽  
pp. 230-236
Author(s):  
Nurul Fasihah Idaham ◽  
Bustam-Khalil Mohamad Azmi ◽  
Chong Fai Kait ◽  
Zakaria Man
Keyword(s):  
Ionic Liquids ◽  
Recovery Process ◽  
Current Work ◽  
Waste Waters ◽  
Recovery Method ◽  
Water Washing

Ionic liquids have been recognized as an alternative solvent applicable in synthesis, separation, catalysis and electrochemistry. However, the synthesis costs, performance efficiencies and problems related to waste waters contaminated with ionic liquids are the major issues that need to be considered. Thus, recovery method is one of the alternatives to overcome the current issues. 1-butyl-3-methylimidazolium-based ionic liquids were chosen for the study. The recovery process was conducted in two steps; water-washing and recovery using solvent. All the selected ionic liquids were extracted with water and BMIM CH3SO4was 100% recovered. However the ionic liquids contained high percentage of water which may change the properties of the ionic liquids. This current work has studied not only on the performance of recovery, but also on the properties and the behaviour of the ionic liquids to be further reused in a particular application.

scholarly journals Influence of Hydrophobicity of Backbone Polymer in Thermo-Responsive Hydrogel with Immobilized Amine on Cycle Capacity for Absorption and Recovery of CO2

Polymers ◽  
2019 ◽  
Vol 11 (6) ◽  
pp. 1024
Author(s):  
Yuma Nagasawa ◽  
Yoshimi Seida ◽  
Takehiko Gotoh ◽  
Eiji Furuya
Keyword(s):  
Energy Consumption ◽  
Polymer Network ◽  
Polymer Networks ◽  
Recovery Process ◽  
Solution Temperature ◽  
Adsorption Model ◽  
Recovery Method ◽  
Desorption Temperature ◽  
Co2 Desorption ◽  
Recovery System

The chemisorption process with amines is the major separation and recovery method of CO2 because of its high processing capacity and simplicity. However, large energy consumption for the desorption of CO2 is also associated with the process. To develop a separation and recovery process that is capable of desorbing CO2 at low temperatures and with minimal energy consumption, polymer hydrogels with a lower critical solution temperature (LCST) polymer network and amine groups immobilized in the polymer network of the hydrogels were exploited. Thermo-responsive amine gels with a series of hydrophobicity of polymer networks were systematically synthesized, and the influence of the hydrophobicity of the gels on the CO2 desorption temperature and cycle capacity (CO2 amount that can be separated and recovered by 1 cycle of temperature swing operation) was investigated using slurries with the series of gels. A significant decrease in the CO2 desorption temperature and increase in the cycle capacity occurred simultaneously by lowering the LCST of the gels via hydrophobisation of the polymer network. Based on an equilibrium adsorption model representing the CO2 separation and a recovery system with the gel slurries, an analysis of the system dynamics was performed in order to understand the recovery mechanism in the process.

scholarly journals Research on Recovery Mechanism and Process of Waste Thermosetting Phenolic Resins Based on Mechanochemical Method

2020 ◽  
Vol 2020 ◽  
pp. 1-12
Author(s):  
Jian Hu ◽  
Huifang Dong ◽  
Shouxu Song
Keyword(s):  
Process Parameters ◽  
Phenolic Resin ◽  
Rotation Speed ◽  
Recovery Process ◽  
The Body ◽  
Cross Linking ◽  
Recovery Method ◽  
Recovery Mechanism ◽  
The Cross ◽  
Feed Volume

The present study analyzed the recovery mechanism of the thermosetting phenolic resin waste, optimizing the recovery process parameters, based on the mechanochemical recovery method. The physical and chemical structure of the ultrapulverized phenolic resin powder was characterized by the low-field NMR (nuclear magnetic resonance), IR (infrared spectroscopy), and SEM (scanning electron microscopy). The recovery process parameters were designed by using the response surface analysis method, and the multiple quadratic regression model was established and the multiobjective process parameter was optimized. The results show that the body network structure of the material is destroyed during the crushing process. The intensity of the internal cross-linking signal is reduced and tends to be stable at about 60%, when the particle size exceeds 120 mesh. The cross-linking bonds methylene (-CH2-) in the main chain of the molecular chain and the C-O bond in the methylol group on the branch are broken. The tensile strength of the recycled sheet made of the phenolic resin powder is 8.27 MPa, and the bending strength is 17.76 Mpa through the mechanical properties test. The influences on the change rate of the cross-linking signal intensity and the yield of the recycled powder are in the following order: rotation speed, feed size, time, and feed volume. The best recovery parameters are as follows: rotation speed of 2820 r/min, time of 80 min, feed particle diameter of 0.43 mm, and feed volume of 60 g.

scholarly journals Electrochemical recovery of tellurium from metallurgical industrial waste

2019 ◽  
Vol 50 (1) ◽  
pp. 1-14 ◽  
Author(s):  
Petteri Halli ◽  
Benjamin P. Wilson ◽  
Taye Hailemariam ◽  
Petri Latostenmaa ◽  
Kirsi Yliniemi ◽  
...  
Keyword(s):  
Precious Metals ◽  
Recovery Process ◽  
Leach Solution ◽  
Cuprous Chloride ◽  
Energy Dispersion Spectroscopy ◽  
Recovery Method ◽  
Aqua Regia ◽  
Rich Solution ◽  
Elemental Copper ◽  
Furnace Slag

Abstract The current study outlines the electrochemical recovery of tellurium from a metallurgical plant waste fraction, namely Doré slag. In the precious metals plant, tellurium is enriched to the TROF (Tilting, Rotating Oxy Fuel) furnace slag and is therefore considered to be a lost resource—although the slag itself still contains a recoverable amount of tellurium. To recover Te, the slag is first leached in aqua regia, to produce multimetal pregnant leach solution (PLS) with 421 ppm of Te and dominating dissolved elements Na, Ba, Bi, Cu, As, B, Fe and Pb (in the range of 1.4–6.4 g dm−3), as well as trace elements at the ppb to ppm scale. The exposure of slag to chloride-rich solution enables the formation of cuprous chloride complex and consequently, a decrease in the reduction potential of elemental copper. This allows improved selectivity in electrochemical recovery of Te. The results suggest that electrowinning (EW) is a preferred Te recovery method at concentrations above 300 ppm, whereas at lower concentrations EDRR is favoured. The purity of recovered tellurium is investigated with SEM–EDS (scanning electron microscope–energy dispersion spectroscopy). Based on the study, a new, combined two-stage electrochemical recovery process of tellurium from Doré slag PLS is proposed: EW followed by EDRR. Graphic abstract

OVERTRAINING SYNDROME IN ATHLETES

2021 ◽  
Vol 0 (24) ◽  
pp. 0-0
Author(s):  
Hayrettin GÜMÜŞDAĞ ◽  
Halit EGESOY ◽  
Burcu VAHAPOĞLU
Keyword(s):  
Team Performance ◽  
Emotional Support ◽  
Recovery Time ◽  
Recovery Period ◽  
Recovery Process ◽  
Recovery Method ◽  
Overtraining Syndrome ◽  
Oxygen Administration ◽  
Load Tolerance ◽  
Continuous Loading

Aim: The aim of our study is to reveal the effect of training overload on athletes. Overtraining syndrome (overtraining) is a very difficult, systemic and complex condition to diagnose. This syndrome occurs with decrease in performance, fatigue, deterioration in sleep patterns, and changes in social behavior when the training load increases unconsciously. Many factors affect the rate and recovery time of overtraining syndrome. These factors are the result of continuous loading, load differential, load tolerance and recovery. The coach needs to plan both the training and the recovery process well. Because optimal performance depends on maintaining the delicate balance between training and recovery. Method: Our study is a compilation obtained to provide information from studies on overtraining syndrome. Findings: In the literature, the symptoms of overtraining are examined under 3 headings as sympathetic, parasympathetic and other symptoms. Conclusion: In order to prevent overtraining syndrome, it is necessary to avoid possible effects that harm team performance. Trainers can facilitate this by changing the training period with the recovery period. In addition, they can help their athletes get rid of this syndrome by using techniques such as mild aerobic activities, massage, hot and cold baths, diet, adequate sleep and psychological relaxation. Recommendation: Nutrition, sleep and rest patterns, recovery efforts (regeneration), emotional support, oxygen administration, medication, etc. are the factors that can treat overtraining syndrome.

Examining stealing thunder as a new service recovery strategy: impact on customer loyalty

2019 ◽  
Vol 31 (2) ◽  
pp. 931-952 ◽  
Author(s):  
Priyanko Guchait ◽  
Rachel Han ◽  
Xingyu Wang ◽  
JéAnna Abbott ◽  
Yetong Liu
Keyword(s):  
Customer Loyalty ◽  
Interaction Effect ◽  
Positive Impact ◽  
Service Failure ◽  
Service Recovery ◽  
Recovery Process ◽  
Joint Effect ◽  
Recovery Method ◽  
Content Type ◽  
Stealing Thunder

PurposeThis paper aims to examine how stealing thunder, apology and compensation influence customer loyalty in a service failure context, and how trust mediates these relationships.Design/methodology/approachThe study adopted a scenario-based between-group experimental design involving 300 customers.FindingsThe results indicated that stealing thunder, apology and compensation have a joint effect on customer loyalty. Specifically, this study found a significant positive impact of stealing thunder on loyalty; a two-way interaction effect of compensation and stealing thunder on loyalty; and a three-way interaction effect on loyalty. Additionally, trust mediated the relationship between service recovery attributes (stealing thunder, apology and compensation) and customer loyalty.Originality/valueThis study introduces a new service recovery method called Stealing Thunder, which is commonly used in the fields of law and communication and is the first to assess stealing thunder as a proactive/preemptive strategy to handle service failures and its impact on customer loyalty. The study found that when stealing thunder was present, compensation had no influence on customer loyalty. Moreover, when stealing thunder was present, compensation had no impact on loyalty when apology was not present. However, compensation had a significant effect on loyalty when stealing thunder and apology were not present. This study finds the value of including proactive/preemptive strategies (stealing thunder) along with regular service recovery strategies (e.g. apology and compensation) in the service recovery process. Results show that service recoveries that include stealing thunder help service failure recovery significantly by increasing customer’s trust.

Study on the Recovery of 1-butyl-3-methylimidazolium-based Ionic Liquids

2014 ◽  
Vol 625 ◽  
pp. 144-147 ◽  
Author(s):  
Nurul Fasihah Idaham ◽  
Mohamad Azmi Bustam Khalil ◽  
Chong Fai Kait
Keyword(s):  
Ionic Liquids ◽  
Recovery Process ◽  
Current Work ◽  
Waste Waters ◽  
Recovery Method ◽  
Water Washing ◽  
Desulfurization Process ◽  
The Common

Nowadays, ionic liquids have been widely used in desulfurization process. However, the synthesis costs, performance efficiencies and problems related to waste waters contaminated with ionic liquids are the major issues that need to be considered. Thus, recovery method is one of the alternatives to overcome the current issues. 1-butyl-3-methylimidazolium-based ionic liquids with three different anions: dicyanamide (N(CN)2), thiocyanate (SCN) and methylsulfate (CH3SO4) were chosen for the study because they are the common ionic liquids used in desulfurization. The recovery process used is water washing which is the cheapest and easiest recovery method. Even though the contaminants in the spent ionic liquids can easily be removed, we found that the recovered ionic liquids contained higher percentage of water as compared to the pure and spent ionic liquids. Thus, the aim of this current work is to study on the feasibility of the spent ionic liquids to be recovered and their performance on desulfurization after being recovered.

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